Part of his improv is real ad hoc stuff but other parts seem to come from stored memories of other songs. I detected something recognizable in that - it seems it had a spanish quality to it. I wish I could identify it more exactly. It's like an older song/theme from the early 60s.
Anyway, yeah, I know there's people who don't like Jimi. And I wonder how many of those Woodstock hippes "really" liked him or where just there to be cool. And another thing - there's all these Simon Cowell wannabees around - they'd probably find something to knock Jimi about.
I think a lot of people wouldn't be convinced he was a "true genius" unless he played some traditional conservative music, like five-fingered classical maybe. Incidentally, I wonder what Jimi would have done with a pop-classical number like Mason Williams' Classical Gas.
Again, I really appreciate your comments and references, JoRO. A post like yours really makes this website totally worthwhile to belong to. I'll be re-reading it and exploring your suggested references.